Dhaartaraashtraa rane hanyuh tanme kshemataram Bhaveth ||
Their mindset was of course clear to Arjuna. But, he said that in such an event, he would better die under their weapons, without resisting them and without using any of his weapons.
Arjuna was thus in a high state of despondency and unwillingness to wage war or kill the Sons of Dhritaraashtra and others on their side.
Visrujya Sasaram chaapam Soka samvigna maanasah ||
He then sat down on his chariot in deep distress.
With this Verse, ends the First chapter titled "Arjuna Vishaada Yoga"; or, the Yoga of Arjuna's Distress.
Bhagavad Gita is widely considered as an Upanishad, a part of Vedas; Like other Upanishads, Gita also teaches "Brahma Vidya", or Supreme knowledge. In that Brahma Vidya, Gita teaches "Yoga Saastra" as a dialogue between Lord Krishna and Arjuna.